248477189 has 2 divisors, whose sum is σ = 248477190. Its totient is φ = 248477188.

The previous prime is 248477153. The next prime is 248477221. The reversal of 248477189 is 981774842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174689089 + 73788100 = 13217^2 + 8590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-248477189 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248417189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124238594 + 124238595.

It is an arithmetic number, because the mean of its divisors is an integer number (124238595).

Almost surely, 2^248477189 is an apocalyptic number.

It is an amenable number.

248477189 is a deficient number, since it is larger than the sum of its proper divisors (1).

248477189 is an equidigital number, since it uses as much as digits as its factorization.

248477189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 50.

The square root of 248477189 is about 15763.1592328442. The cubic root of 248477189 is about 628.6788379688.

The spelling of 248477189 in words is "two hundred forty-eight million, four hundred seventy-seven thousand, one hundred eighty-nine".